package com.crawler;

import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.LinkedBlockingQueue;

public class CrawlerQueue {

    private volatile LinkedBlockingQueue<String> unVisitedUrlQueue = new LinkedBlockingQueue();
    private volatile Set<String> visitedUrlSet = Collections.synchronizedSet(new HashSet());

}
